The target audience for this would know this, but it's useful to be reminded. INR (Indian Rupee) depreciates on average about 4% each year against USD (US Dollar). When you look at the gains from investments in India in USD terms, it would be lower due to the continuously weakening currency. As an emerging market and one with a still-developing stock market, the returns could be comparatively a lot higher along with volatility.
People in India who "invest" ("gamble" may be a better term) in the stock market are used to larger double digit returns and chase "multi baggers" (check some financial publications in India and you'll find many headlines about multi baggers). This makes the same bunch beat a retreat at the first sign of a downturn.
Tax laws in India are getting more complex and onerous (because the government believes everyone to be a tax evader unless proven otherwise), and it seems like the government wants to slow down the outflow of money from the country while getting a larger slice in advance. Though the government wants to attract non-resident Indians to invest (they've historically sent a lot of money into the country), it's also reluctant to provide an attractive taxation and tax compliance experience. If you choose to invest through this or any other platform, keep an eye on the changing tax laws so that you can exit before things suddenly become painful with very little notice. As an example, though the union budget with tax changes was presented in the beginning of February in the parliament, the government made a slew of changes that impact whole classes of mutual funds just a few days ago with no discussion in parliament and passed all of those (because the ruling party has a majority).